<?php

// 定義一個類來處理微信小程序的API調用
class WeChatMiniProgram
{
    private $appid;
    private $secret;

    public function __construct($appid, $secret)
    {
        $this->appid = $appid;
        $this->secret = $secret;
    }

    // 獲取access_token的方法
    public function getAccessToken()
    {
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" . $this->appid . "&secret=" . $this->secret;

        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 注意：在生產環境中，最好將其設置為true并配置CA證書

        $response = curl_exec($ch);
        curl_close($ch);

        if ($response === false) {
            throw new Exception('cURL Error: ' . curl_error($ch));
        }

        $json = json_decode($response, true);

        if (isset($json['access_token'])) {
            return $json['access_token'];
        } else {
            throw new Exception('Failed to get access_token: ' . json_encode($json));
        }
    }
}

// 使用示例
try {
    $appid = "1"; // 請替換為你的小程序appid
    $secret = "1"; // 請替換為你的小程序secret

    $weChatMiniProgram = new WeChatMiniProgram($appid, $secret);
    $accessToken = $weChatMiniProgram->getAccessToken();

    echo "Access Token: " . $accessToken;
} catch (Exception $e) {
    echo 'Error: ' . $e->getMessage();
}